Hirotoshi Kakuta

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Utsunomiya-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker unit, speaker system, and speaker diaphragm manufacturing m...
- Patent number 6,543,573
- Issue date Apr 8, 2003
- JSP Corporation
- Yoshihisa Ishihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Speaker unit, speaker system, and speaker diaphragm manufacturing m...
- Publication number 20010050194
- Publication date Dec 13, 2001
- JSP CORPORATION
- Yoshihisa Ishihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE